(3Z)-3-1-[(5-Phenyl-1H-pyrazol-3-yl)amino]ethylidene}-4,5-dihydrofuran-2(3H)-one, C15H15N3O2, (I), and the stoichiometric adduct (3Z)-3-1-[(5-methyl-1H-pyrazol-3-yl)amino]ethylidene}-4,5-dihydrofuran-2(3H)-one-6-(2-hydroxyethyl)-2,5-dimethylpyrazolo[1,5-a]pyrimidin-7(4H)-one (1/1), C10H13N3O2 center dot C10H13N3O2, (II), in which the two components have the same composition but different constitutions, are formed in the reactions of 2-acetyl-4-butyrolactone with 5-amino-3-phenyl-1H-pyrazole and 5-amino-3-methyl-1H-pyrazole, respectively. In each compound, the furanone component contains an intramolecular N-H center dot center dot center dot O hydrogen bond. The molecules of (I) are linked into a chain by a single intermolecular N-H center dot center dot center dot O hydrogen bond, while in (II), a combination of one O-H center dot center dot center dot N hydrogen bond, within the selected asymmetric unit, and two N-H center dot center dot center dot O hydrogen bonds link the molecular components into a ribbon containing alternating centrosymmetric R-4(4)(20) and R-6(6)(22) rings.
(3Z)-3-1-[(5-苯基-1H-
吡唑-3-基)
氨基]亚乙基}-4,5-二氢
呋喃-2(3H)-酮,
C15H15N3O2,(I),以及计量配合物(3Z)-3-1-[(5-甲基-1H-
吡唑-3-基)
氨基]亚乙基}-4,5-二氢
呋喃-2(3H)-酮-6-(2-羟乙基)-2,5-二甲基
吡razolo[1,5-a]
嘧啶-7(4H)-酮 (1/1),
C10H13N3O2· ,(II),其中两种组分具有相同的组成但不同的结构,在2-乙酰基-4
-丁内酯分别与5-
氨基-3-苯基-1H-
吡唑和5-
氨基-3-甲基-1H-
吡唑的反应中生成。在每种化合物中,
呋喃酮组分包含一个分子内N-H…O氢键。化合物(I)的分子通过一个分子间N-H…O氢键连接成链状,而在化合物(II)中,一对O-H…N氢键(在选定的不对称单元内),以及两个N-H…O氢键将分子组分连接成一个包含交替的中心对称R-4(4)(20)和R-6(6)(22)环的带状结构。